Microwave oven



FIG. 1 is a perspective view of a microwave oven in accordance with mynew design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left elevational view thereof;

FIG. 7 is a right elevational view thereof; and,

FIG. 8 is a perspective view thereof, with the door to the oven chamberin an open position.

The details shown in broken lines form no part of the claimed design.

The ornamental design for a microwave oven, as shown and described.